Controls are wrapped when ajaxified

Hello, I have two RadTextBoxes which should be filled with values when the user selects a RadComboBox item.
The text boxes are ajaxified. When running the programme my textboxes are always wrapped beneath each other. I cannot resolve this behaviour. When I disable Ajax my controls are besides each other as expected, but not filled with values.
Does any one konow about this issue?
Thanks in advance
Roberto Wenzel

Progress, Telerik, and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. See Trademarks or appropriate markings.